Arima Yoriyuki
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Template:Short description Template:Use mdy dates Template:Family name hatnote
Template:Nihongo was a Japanese mathematician of the Edo period. He was the lord of Kurume Domain.
He approximated the value of <math>\pi</math> and its square, <math>\pi^2</math>. In 1766, he found the following rational approximation of <math>\pi</math>, correct to 29 digits:<ref>Template:Cite web</ref><ref> Template:Cite book</ref>
- <math>\pi\approx\frac{428224593349304}{136308121570117}=3.14159265358979323846264338327(569...).</math>
References
Further reading
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